Veneer-cutting machine



A il l pr 927 c. STRAUB VENEER CUTTING MACHINE Filed Feb. 5. 1925 4 2 Sheets-Shet 2 nomtoz Christopher Straub elf 3m 4 Patented Apr. 2c, 1927.

riser CHRISTOPHER STRAUBZVQF: EAST ELMl-IURST, NEW YORK, ASSIGNOR, BY ivrnsnn A84 sIGNMEN'rs, mo-Asronm IMPORTING Ann MANUFACTURING 00. mo.

VENEER-CUTTING MACHINE.

Application filed February 5, 1925. Serial No. 6,917. v

This invention relates .to rotary veneer cutting machines and more particularly to means for securing the block of wood in'op erative position in connection therewith. It has heretofore been proposed, particularly in connection with one-half" rotary veneer out tingmachines, to secure the block of wood to the stay-log by providing a multiplicity of screws passing through appropriate apertures in the stay-log which are screwed into the log from which the veneer is to be cut to hold the same firmly in operative position; This method of securing the log has been open to the objection that that portion of the block into which the screws extend is so mutilated thereby as to be unfitted for use The present invention has for its object to provide means for securing the block to the staylog which will injure minimum portions of the block whereby a greater proportion thereof may 'be availed of in the manufacture of veneer. Accordingly, chucks or dogs are provided adjustably mounted upon the stay-log to engage the ends of the block from which the veneer is to be taken and retainthe same rigidly in operative position'with respect to the staylog. More particularly a chuck or dog, movable with respect to the stay-log, is adapted to be secured in fixed position with respect thereto and is formed on the faceadjacent the block with a plurality of knife edges adapted to engage the end of the block, a similar chuck facing in theopposite direc-' tion to engage the other end of the block. If desired means'may 'be provided in connection with one or both 'chucksto adjust the position thereof with respect to the stay-log to provide a. more rigid engagement of the block therebetween. 'Certain of the knife edges on the chucks may be beveled. to provide a wedging action. which will force the block downwardly against the staylog and thus contribute to the rigid retention thereof in position.

It sometimes happens that the fiitches or blocks of wood have defects in their ends which makes it difiicult to grip the ends firmly by the chucks as just described. In this situation supplemental chucks may be provided which are mounted upon the usual chucks to provide knife edges to grip an additional area of the ends of the blocks. More particularly the. supplemental chuck is adapted to engage with the top of the main chuck and to be detachably secured thereto and is provided with additional knife edges to be disposed above and co-operating with the knife edges of the main chuck.

For a more detailed description of the invention reference will now be'had to the ac companying drawing illustrating a preferred embodiment thereof and in whichi Figure l is a view looking from above and showing a block of wood in position upon the stay-log of a one-half rotary veneer eutand showing a dog mounted upon the staylog and the knife edges which engage the block of wood shown in broken lines.

Figure 4; is a view in isometric projection of the supplemental chuck showing the location of theknife edges.

Figure 5 is an isometric view'showing the supplemental chuck in operative position in relation with a main chuck, f

Figure 6 is a view'in rear elevation showing the supplemental dog or chuck mounted upon the'main' dog, the preferred means of securin g the two together being illustrated as a spring pressed latch.

In the manufacture of veneer in a one half round rotary veneer cutting machine a block of wood a generally semicircular in cross section from which the veneer is to be cut is mounted upon a stay-log 7; which is adapted to be rotated through 180 to carry the block a against a knife edge. which re moves a layer of veneer. The stay-log is fiat along its upper section as at b to receive the flat surface of the wooden block a and forms the mid-section of a substantially round axle B carried between a pair of gear wheels 0 which mesh with suitable machinery .to rotate the stay-log through 180about its longitudinal axis. Heretofore it has been the practice to form in the-stay-log. a plurality .of series of holesthrough which screws may pass to engage the block of wood. The use of such screws, however, mutilates the block to such degree as torender unfit for use a considerable portion thereof; To avoid this waste applicant proposes to provide'dogs or spect to the stay-log b. 'The stay-log is normally flat and of greater width in a transverse direction than the round portion of the axle B thus forming what amounts to flanges upon opposite sides thereof which may be conveniently engaged by downwardly extendin ortions d or e as the case may be formed inwardly with recesses, say (l to receive the flanges 6 Preferably the flanges b and the recesses, say Z so cooperate as to permit the dogs to be slid back and forth along the length of the stay-log; The chuck is preferably semi-circular in cross section as shown clearly in Figure 3 in order to provide a surface to c00perate withas great an area of the end of the block as possible without interfering with the knife edges during the movement of the block. Upon one face of the chuck and at the upper periphery thereof there is formed a semi-circular knife edge d or 6 while radially disposed knife edgesd and e, which in the illustrated embodiment are vthreevin number, are formed belowthe semi-circular knife edges (23, 6 respectively. 7

In securing the block of wood to the staylog one of the dogs is adapted to be disposed in predetermined position with respect to the stay-log and secured in such position. The dog is preferably secured in predetermined position by adjustable devices which, in the illustrated embodiment, take the form of teeth 72 formed centrally of the stay-log which are adapted to be engaged by a finger (Z pivotally mounted upon the face of the dog (Z. The series of teeth are of limited extent longitudinally of the stay-log; but are sufficient in number to allow a degree of ad j ustment of the dog (Z to permit accommodation of l'ilocks of wood of different length. Upon the opposite end of the stay-log is mounted a dog 6 slidable upon the flanges 71 and provided with inwardly facing teeth 6 similar in every respectto the teeth at, cl. -No ratchet is provided on thechuck 6, however, but outwardly of thedog 6 there is disposed what maybe termed anut f slid able'in a similar manner with respect to the stay-log and having pivoted on its outer face a finger f adapted to engage inwardly facing teeth Z1 formed on the-upper face of the stay-log at that end. Meansto adjust the position of the chuck c with respect to the nut f are shown as a. threaded rod 7 rotatable within a threaded aperture f in. the nut f and bearing against the proximate face 6 of chuck e. f in appropriate direction will cause the end Rotation of the handle of the rod f to bear against the face 6 of the chuck to force the chuck away from the face and cause the knife edges 6 and positioned at an appropriate place dependent upon the length of the block of wood a and maintainedin such predetermined position by the en'eagementfof the finger with a tooth 72 The block of wood a is placed upon the stay-log and forced against the knife edges to engage the same. The nut f and chuck e are then moved along the stay log to approximately appropriate position to permit the knife edges 6 e to engage the block of wood and one of the teeth 5 is engrae'ed bythe fin er 7. The threaded rod 7 is then rotated in appropriate direction to bear against the'face of chuck e and the pressure set up thereby causes the knife edges 6 e to bite into the block of wood.

Preferably knife edges d and e are bevele-d in a downwardly facing direction-as indicated at (Z 6 It will thus be seen that when the knife edges are caused to bite: into the log the beveled edges of the plateswill have a tendency to force the block'downwardly against the stay-log and hold the sa ne rigidly in position;

While the dos: just described is effective insecuring a'block of wood to a one-half rotary veneer cutting machine, it may also he found desirable to secure extra flitches or blocks of wood to the stay-log or the block may have such defects in its ends as to make fit CllillCillll to securely grip the same with the does. It is, therefore. proposed to provide a supplemental chuck or. dos: which may be superimposed upon the main doe and provided with knife edges extending: in the samepjeneral direction as the'krife edges on the main dog whereby a greater area of the ends of the block may beenaaged by knife ed gjcs. Accordingly a suplemental don; 7 maybe provided having at its one end an arcuato knife edge beveled at its lower side as at to provide wcdnino; action as hereinbefore described in connection with the knife edges 0 and if desired a vertically disposed knife edge The supplei'nental do q is adapted to be secured above the main dog, say on (or (Z) so that the knife eda'csy q lie-in the same vertical plane with the knife edues of the main dogs. To provide for ready attachment and removal it is preferred to form a slot shown in the drawings as c in plemental dog a latch of any convenient construction may be provided. 7 In Figure 6 there is illustrated a pin h formed with a shoulder h passing through a hole g in they supplemental dog and entering a hole 6 in the main dog 0. The shoulders I) serve not only as engaging surfaces for the fingers or a tool whereby the pin it may be moved upwardly out of the recess 6 but also as a bearing for the resilient element or coil spring tending to force the pin downwardly for engagement'with the hole in they main dog.

It will be evident that means have been provided which are readily adjustable to engage a block of wood from which veneer is to be peeled and retain the samevin operative position with respect to the staylog whereby the knife edges may operate upon the wood with precision and without danger of the block slipping and spoiling the cut. Various modifications may be made in the method of adjustment of the chucks with respect to each other and the stay-log as well as in the number and configuration of the wood engaging instrumentalities formed thereon and no limitation is intended by the foregoing description except as indi cated in the appended claims.

What I claim is:

1. In a half round rotary veneer cutting machine, the combination with a stay-log operatively rotatable about its own axis, of means slidable on the stay-log to secure a half round flitch thereto and means cooperating with the stay-log to adjustably position the first named means.

2. In a rotary veneer cutting machine, the combination with an axially rotatable support for a block of wood, of a plurality of chucks carried with the support and having knife edges on opposed faces to engage the respective ends of the block of wood, and means to adjustably secure one of the chucks in predetermined position to the support, a base, means to adjustably secure the base in predetermined position with respect to the support, and means on the base to adjust another of the chucks with respect to the base and the support and the first named chuck.

3. In a rotary veneer cutting machine, the combination with a support for a block of wood, rotatable about its axis of a chuck to engage an end of the block, pawl and ratchet means to position the chuck with respect the support, a stop, pawl and ratchet means to secure the stop in predetermined position with respect to the support, a chuck to engage the other end of the block of wood, and means to adjust the relative relation of the stop and last named chuck.

4.. In a rotary veneer cutting machine, the combination with a support for a block of wood, of a chuck slidable on the support and having an inverted U-shaped knife blade and radially disposed knife-blades within the U-shaped portion.

5. In a rotary veneercutting machine, the combination with a support for a block of wood, of a chuck having an inverted U- shaped knife blade beveled on the lower side of its edge and radially disposed knife blades within the U-shaped portion.

6. In a rotary veneer cutting machine having a stay-log for the support of a flitch, in combination a main chuck adjustably mounted on the stay-log, a supplemental chuck formed with a knife edge upon one face thereof, and means to removably secure the supplemental chuck to the main chuck.

7 In a half round rotary veneer cutting machine, the combination with an axially rotatable stay-log and a main chuck slidable on the stay-log, of a supplemental chuck formed with a curvilinear knife blade upon one face thereof, and means to removably secure the supplemental chuck to the main chuck.

8. In a half round rotary veneer cutting machine, the combination with an axially rotatable stay-log and a main chuck slidable thereon, of a supplemental chuck formed with a curvilinear knife blade and averticaL ly disposed knife blade upon one face thereof, and means to removably secure the supplemental chuck to the main chuck.

9. In a rotary veneer cutting machine having a stay-log for the support of a flitch the combination with a main chuck for a rotary veneer cutting machine of asupplemental chuck formed with a curvilinear knife blade beveled on the lower side of its edge and a Vertically disposed knife blade upon one face thereof, and means to removably secure the supplemental chuck to the main chuck.

10. The combination, in a veneer cutting machine having a rotatable stay-log for the support of a flitch, with a main chuck formed with knife blades upon one face thereof and a slot in its upper surface of a sup flemental chuck formed with knife blades to co-operate with the knife blades of the main chuck and a lug to engage the slot, and means to removably secure the supplemental chuck to the main chuck.

11. The combination, in a veneer cutting support of a flitch, with a main chuck formed with knife blades upon one face thereof and a slot in its upper surface of a supplemental chuck formed with knife blades to co-operate with the knife blades of the main chuck, and a spring pressed pin carried with the supplemental chuck and engaging a recess in the main chuck.

This specification signed this 2d day of February, A. D. 1925,.

CHRISTOPHER STRAUB. 

